From patchwork Fri Sep 22 07:58:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 726072 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 461CECD4F2B for ; Fri, 22 Sep 2023 08:03:32 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 607CCE8A; Fri, 22 Sep 2023 10:02:40 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 607CCE8A DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1695369810; bh=mOfjTOE3CWyP3bmauR74phiOSf+Dz6WIXLBZsVqpoWw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-Id: List-Archive:List-Help:List-Owner:List-Post:List-Subscribe: List-Unsubscribe:From; b=hC5Qm6xDEhACTWHBg7Cis6h8wwGiOIYgm4sMyNqZOTm025fPtDO5nwCHFwdG0T765 EJwCc1fOJZKTKgbeiRvldSZ9BEwts8LNW1exE+bL+2N5jMnjJ1O3nD7xNSlZaf0DLr WVSInD+Ezld/1uweqYwTjQ1LQdSebmCbfhWf/GlE= Received: by alsa1.perex.cz (Postfix, from userid 50401) id 24CA5F805F7; Fri, 22 Sep 2023 10:00:08 +0200 (CEST) Received: from mailman-core.alsa-project.org (mailman-core.alsa-project.org [10.254.200.10]) by alsa1.perex.cz (Postfix) with ESMTP id 81E3FF805F5; Fri, 22 Sep 2023 10:00:07 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id CB3DBF805DF; Fri, 22 Sep 2023 09:59:59 +0200 (CEST) Received: from relay8-d.mail.gandi.net (relay8-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::228]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 62DE8F805C4 for ; Fri, 22 Sep 2023 09:59:55 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 62DE8F805C4 Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key, unprotected) header.d=bootlin.com header.i=@bootlin.com header.a=rsa-sha256 header.s=gm1 header.b=eM5ji/oK Received: by mail.gandi.net (Postfix) with ESMTPA id 804A71BF204; Fri, 22 Sep 2023 07:59:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1695369594; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ACSV41BkWA0fKq39dfPL/AXLiyPkmOTVZUoZxLiKbNE=; b=eM5ji/oK2mtbgMmBhGUYdTj50HdURBVO614lILo24n57NzvRqlGSCQTKkH0IZgOODoVxjA vqCr7aBCGqOC6ZQ9KmuqCLKZyc2ndrkdYvR9bNzY7B45SAd/WRklrjCOQE8noLL6WHZ8Ia ugcnIp/Xc4ENj4i94MsG98GXpPWLxH0PrHnc5wmeQ0jX3SE2QWUZxItKU/1FfpS5BsdUu2 89Wm0c55fEV58NS4sEiEPX0wVz2Dk0EgGyr+nGt0f7FikNkQuR8utMeY++PatFPXNq+Dif 2o4dNOdOFiIqSmlAcvOkR3/0H6Id6iz6G+2UWwjVhFb/r19+9PUBLhh6uzKVag== From: Herve Codina To: Herve Codina , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Lunn , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Lee Jones , Linus Walleij , Qiang Zhao , Li Yang , Liam Girdwood , Mark Brown , Jaroslav Kysela , Takashi Iwai , Shengjiu Wang , Xiubo Li , Fabio Estevam , Nicolin Chen , Christophe Leroy , Randy Dunlap Cc: netdev@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-arm-kernel@lists.infradead.org, alsa-devel@alsa-project.org, Simon Horman , Christophe JAILLET , Thomas Petazzoni Subject: [PATCH v6 09/30] soc: fsl: cpm1: qmc: Add support for child devices Date: Fri, 22 Sep 2023 09:58:44 +0200 Message-ID: <20230922075913.422435-10-herve.codina@bootlin.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230922075913.422435-1-herve.codina@bootlin.com> References: <20230922075913.422435-1-herve.codina@bootlin.com> MIME-Version: 1.0 X-GND-Sasl: herve.codina@bootlin.com Message-ID-Hash: ZVNCF7P7ZTVBK7LKXZBBOS2J5TH7AEGL X-Message-ID-Hash: ZVNCF7P7ZTVBK7LKXZBBOS2J5TH7AEGL X-MailFrom: herve.codina@bootlin.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.8 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: <> List-Archive: <> List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: QMC child devices support is needed to avoid orphan DT nodes that use a simple DT phandle to reference a QMC channel. Allow to instantiate child devices and also extend the API to get the qmc_chan using a child device. Signed-off-by: Herve Codina --- drivers/soc/fsl/qe/qmc.c | 91 +++++++++++++++++++++++++++++++--------- include/soc/fsl/qe/qmc.h | 2 + 2 files changed, 73 insertions(+), 20 deletions(-) diff --git a/drivers/soc/fsl/qe/qmc.c b/drivers/soc/fsl/qe/qmc.c index 459e0bbd723d..5da15a25600e 100644 --- a/drivers/soc/fsl/qe/qmc.c +++ b/drivers/soc/fsl/qe/qmc.c @@ -1425,8 +1425,16 @@ static int qmc_probe(struct platform_device *pdev) platform_set_drvdata(pdev, qmc); + /* Populate channel related devices */ + ret = devm_of_platform_populate(qmc->dev); + if (ret) + goto err_disable_txrx; + return 0; +err_disable_txrx: + qmc_setbits32(qmc->scc_regs + SCC_GSMRL, 0); + err_disable_intr: qmc_write16(qmc->scc_regs + SCC_SCCM, 0); @@ -1467,26 +1475,16 @@ static struct platform_driver qmc_driver = { }; module_platform_driver(qmc_driver); -struct qmc_chan *qmc_chan_get_byphandle(struct device_node *np, const char *phandle_name) +static struct qmc_chan *qmc_chan_get_from_qmc(struct device_node *qmc_np, unsigned int chan_index) { - struct of_phandle_args out_args; struct platform_device *pdev; struct qmc_chan *qmc_chan; struct qmc *qmc; - int ret; - ret = of_parse_phandle_with_fixed_args(np, phandle_name, 1, 0, - &out_args); - if (ret < 0) - return ERR_PTR(ret); - - if (!of_match_node(qmc_driver.driver.of_match_table, out_args.np)) { - of_node_put(out_args.np); + if (!of_match_node(qmc_driver.driver.of_match_table, qmc_np)) return ERR_PTR(-EINVAL); - } - pdev = of_find_device_by_node(out_args.np); - of_node_put(out_args.np); + pdev = of_find_device_by_node(qmc_np); if (!pdev) return ERR_PTR(-ENODEV); @@ -1496,17 +1494,12 @@ struct qmc_chan *qmc_chan_get_byphandle(struct device_node *np, const char *phan return ERR_PTR(-EPROBE_DEFER); } - if (out_args.args_count != 1) { + if (chan_index >= ARRAY_SIZE(qmc->chans)) { platform_device_put(pdev); return ERR_PTR(-EINVAL); } - if (out_args.args[0] >= ARRAY_SIZE(qmc->chans)) { - platform_device_put(pdev); - return ERR_PTR(-EINVAL); - } - - qmc_chan = qmc->chans[out_args.args[0]]; + qmc_chan = qmc->chans[chan_index]; if (!qmc_chan) { platform_device_put(pdev); return ERR_PTR(-ENOENT); @@ -1514,8 +1507,44 @@ struct qmc_chan *qmc_chan_get_byphandle(struct device_node *np, const char *phan return qmc_chan; } + +struct qmc_chan *qmc_chan_get_byphandle(struct device_node *np, const char *phandle_name) +{ + struct of_phandle_args out_args; + struct qmc_chan *qmc_chan; + int ret; + + ret = of_parse_phandle_with_fixed_args(np, phandle_name, 1, 0, + &out_args); + if (ret < 0) + return ERR_PTR(ret); + + if (out_args.args_count != 1) { + of_node_put(out_args.np); + return ERR_PTR(-EINVAL); + } + + qmc_chan = qmc_chan_get_from_qmc(out_args.np, out_args.args[0]); + of_node_put(out_args.np); + return qmc_chan; +} EXPORT_SYMBOL(qmc_chan_get_byphandle); +struct qmc_chan *qmc_chan_get_bychild(struct device_node *np) +{ + struct device_node *qmc_np; + u32 chan_index; + int ret; + + qmc_np = np->parent; + ret = of_property_read_u32(np, "reg", &chan_index); + if (ret) + return ERR_PTR(-EINVAL); + + return qmc_chan_get_from_qmc(qmc_np, chan_index); +} +EXPORT_SYMBOL(qmc_chan_get_bychild); + void qmc_chan_put(struct qmc_chan *chan) { put_device(chan->qmc->dev); @@ -1552,6 +1581,28 @@ struct qmc_chan *devm_qmc_chan_get_byphandle(struct device *dev, } EXPORT_SYMBOL(devm_qmc_chan_get_byphandle); +struct qmc_chan *devm_qmc_chan_get_bychild(struct device *dev, + struct device_node *np) +{ + struct qmc_chan *qmc_chan; + struct qmc_chan **dr; + + dr = devres_alloc(devm_qmc_chan_release, sizeof(*dr), GFP_KERNEL); + if (!dr) + return ERR_PTR(-ENOMEM); + + qmc_chan = qmc_chan_get_bychild(np); + if (!IS_ERR(qmc_chan)) { + *dr = qmc_chan; + devres_add(dev, dr); + } else { + devres_free(dr); + } + + return qmc_chan; +} +EXPORT_SYMBOL(devm_qmc_chan_get_bychild); + MODULE_AUTHOR("Herve Codina "); MODULE_DESCRIPTION("CPM QMC driver"); MODULE_LICENSE("GPL"); diff --git a/include/soc/fsl/qe/qmc.h b/include/soc/fsl/qe/qmc.h index 6f1d6cebc9fe..166484bb4294 100644 --- a/include/soc/fsl/qe/qmc.h +++ b/include/soc/fsl/qe/qmc.h @@ -17,9 +17,11 @@ struct device; struct qmc_chan; struct qmc_chan *qmc_chan_get_byphandle(struct device_node *np, const char *phandle_name); +struct qmc_chan *qmc_chan_get_bychild(struct device_node *np); void qmc_chan_put(struct qmc_chan *chan); struct qmc_chan *devm_qmc_chan_get_byphandle(struct device *dev, struct device_node *np, const char *phandle_name); +struct qmc_chan *devm_qmc_chan_get_bychild(struct device *dev, struct device_node *np); enum qmc_mode { QMC_TRANSPARENT,